Basic Linux Operations

View network management feature status → Enable this feature in REDHAT7 to edit the network configuration

[Email protected]/]# systemctl status NetworkManager

Networkmanager.service-network Manager

Loaded:loaded (/usr/lib/systemd/system/networkmanager.service; enabled; vendor preset:enabled)

Active:active (running) since two 2016-06-21 07:37:37 CST; 7h left

Main pid:1011 (NetworkManager)

CGroup:/system.slice/networkmanager.service

└─1011/usr/sbin/networkmanager--no-daemon

Running is turned on and can be turned on manually if not turned on.

[Email protected]/]# systemctl start NetworkManager

See if the firewall is off

[Email protected]/]# systemctl status Firewalld

firewalld.service-firewalld-dynamic Firewall daemon

Loaded:loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset:enabled)

Active:active (running) since two 2016-06-21 00:24:01 CST; 1min 56s ago

Main pid:1004 (FIREWALLD)

CGroup:/system.slice/firewalld.service

└─1004/usr/bin/python-es/usr/sbin/firewalld--nofork--nopid

Running is turned on, turn off the firewall and then under view

[[email protected]/]# systemctl stop firewalld manually turn off the firewall

[[email protected]/]# systemctl status firewalld view firewall status

firewalld.service-firewalld-dynamic Firewall daemon

Loaded:loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset:enabled)

Active:inactive (dead) since two 2016-06-21 00:26:12 CST; 1s ago

process:1004 execstart=/usr/sbin/firewalld--nofork--nopid $FIREWALLD _args (code=exited, status=0/success)

Main pid:1004 (code=exited, status=0/success)

Self-booting firewall

[email protected]/]# Systemctl enable FIREWALLD  

Manually turn on the firewall

[Email protected]/]# systemctl start FIREWALLD

Self-closing firewall

[Email protected]/]# systemctl disable FIREWALLD

Removed Symlink/etc/systemd/system/basic.target.wants/firewalld.service.

Removed Symlink/etc/systemd/system/dbus-org.fedoraproject.firewalld1.service.

To mount the disc, first use DF to view the next.

[[email protected]/]# DF

File system 1k-block already used% mount point available

/dev/mapper/rhel_dy-root 18348032 4104968 14243064 23%/

Devtmpfs 485132 0 485132 0%/dev

Tmpfs 500680 500592 1%/DEV/SHM

Tmpfs 500680 7196 493484 2%/run

Tmpfs 500680 0 500680 0%/sys/fs/cgroup

/dev/sr0 3947824 3947824 0 100%/mnt

/DEV/SDA1 508588 143108 365480 29%/boot

TMPFS 100136 8 100128 1%/run/user/0

The disc is mounted and the unmount disc is mounted

[[email protected]/]# umount/dev/sr0 unmount disc

[[email protected]/]# DF using DF to see that the disc has been uninstalled

File system 1k-block already used% mount point available

/dev/mapper/rhel_dy-root 18348032 4105020 14243012 23%/

Devtmpfs 485132 0 485132 0%/dev

Tmpfs 500680 500592 1%/DEV/SHM

Tmpfs 500680 7196 493484 2%/run

Tmpfs 500680 0 500680 0%/sys/fs/cgroup

/DEV/SDA1 508588 143108 365480 29%/boot

TMPFS 100136 8 100128 1%/run/user/0

Manually mount a disc

[[email protected]/]# mount/dev/sr0/mnt Mount CD to the MNT directory

Mount:/dev/sr0 write protection, will be mounted as read-only

Then use DF to see if it's mounted

[[email protected]/]# DF

File system 1k-block already used% mount point available

/dev/mapper/rhel_dy-root 18348032 4105000 14243032 23%/

Devtmpfs 485132 0 485132 0%/dev

Tmpfs 500680 500592 1%/DEV/SHM

Tmpfs 500680 7196 493484 2%/run

Tmpfs 500680 0 500680 0%/sys/fs/cgroup

/DEV/SDA1 508588 143108 365480 29%/boot

TMPFS 100136 8 100128 1%/run/user/0

/dev/sr0 3947824 3947824 0 100%/mnt disc already mounted

Auto-mount disc on boot

[[email protected]/]# echo "/dev/sr0/mnt iso9660 defaults 0 0" >>/etc/fstab

Configure local Yum Source

First delete the local Yum source

[Email protected]/]# rm-rf/etc/yum.repos.d/*

See if it has been deleted

[Email protected]/]# ls/etc/yum.repos.d/

[Email protected]/]#

Start configuring the local Yum source

[email protected] yum.repos.d]# cat > Redhat.repo << EOF

> [Redhat] Yum Source

> name=redhat Name

> Baseurl=file:///mnt mount to the MNT directory

> Enabled=1 Enabled

> gpgcheck=0 not detected

> EOF End

[[email protected] yum.repos.d]# cat Redhat.repo view Yum source

[Redhat]

Name=redhat

Baseurl=file:///mnt

Enabled=1

Gpgcheck=0

[[email protected]/]# Yum clean all clear Yum library

[[email protected]/]# Yum list view available installation packages

This article from "DY" blog, reproduced please contact the author!

Basic Linux Operations